Local Air Quality Conditions

National Parks/Monuments
Tribal BoundariesThe tribal boundaries shown here are provided by the Bureau of Indian Affairs
and are intended to be used as a general spatial reference only. They are not a formal
determination of tribal boundaries by the EPA.

National Parks/Monuments
Tribal BoundariesThe tribal boundaries shown here are provided by the Bureau of Indian Affairs
and are intended to be used as a general spatial reference only. They are not a formal
determination of tribal boundaries by the EPA.

National Parks/Monuments
Tribal BoundariesThe tribal boundaries shown here are provided by the Bureau of Indian Affairs
and are intended to be used as a general spatial reference only. They are not a formal
determination of tribal boundaries by the EPA.

Forecast Discussion: FORECAST SUMMARY: Thursday, July 30th, 2015 through Monday, August 3rd, 2015 Ozone: 8-hour Ozone is expected to be generally Good with only scattered Moderates through the period. PM-2.5: 24-hour Fine Particulate concentrations will be the same…mostly Good with scattered low Moderates. FORECAST DISCUSSION: High pressure dominates our weather as we end the work-week. Temperatures will be warm; however, strong west winds at the surface and upper levels will produce lots of mixing which will stop pollution from increasing. Most locations will experience Goop ozone and fine particulate levels Thursday and Friday. The best chance for Moderate readings will be in along the Lake Michigan shoreline. Areas south of Muskegon may reach Moderate for ozone the next few days. A weak shortwave moving through the upper flow will bring a small chance for showers late Friday. High pressure then settles in Saturday. West/northwest surface winds switch to a southwesterly direction later in the day. There is a chance that ozone may again reach Moderate in southwest Michigan along the lakeshore; however, most of the state will have Good fine particulate and ozone levels. Another disturbance moves in late Saturday/early Sunday bringing more chances for scattered precipitation. The, a stronger low pressure area tracks from northwest to south east across the state late Sunday into Monday. This is when areas will see better chances for precipitation. With these on and off systems moving through the region, pollution will not have time to build-up; therefore, pollution will be mostly Good through early next week. EXTENDED FORECAST: Extended forecast models show an upper level trough digging into the eastern half of the U.S. through mid-week next week. For Michigan, this means generally dry conditions with slightly cooler than normal temperatures. With cooler temperatures at the surface and upper levels, and with a decent northwest wind, pollution is expected to remain Good through mid-week next week… Forecast updated by Stephanie Hengesbach: Thursday, July 30th, 2015 Next forecast update: Monday, August 3rd, 2015